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@uitrit gisten @anni @ffice JOHN RICHARDS AND WILLIAM H. DOANE, CFCINCINNATI, CHIC, ASSIGN- CRS TO J. A. FAY & CC., CF SAME PLACF.

Letters Patent 68,791, dated September 10, 1867.

IMPROVEMENT IN- MORTISNG MACHINES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, JonaT Rrcnnnns and WLLLLlu il. Down, of Cincinnati,county of Hamilton, and State of Chio, have invented certainImprovements in Mortising Machines; and wc do hereby declare thefollowing to be a full and exact description of the same, referencebeing had to the accompanying drawings7 forming a part of thisspecification, in which- Figure 1 is a side elevation of a mortisingmachine having our improvements, with a portion of the main columnremoved to show the mechanism within. i v

Figure 2, an enlarged diagram of the eccentric yoke and cam-hook forreversing the chisel-bar, and

Figure 3 a diagram showing an enlarged view of the mechanism for movingthe reversing-bar.

Similar letters of reference on the different tigurcs indicatecorresponding parts.

The nature of this invention consists, first, in a novel mechanism forreversingthc chisel automatically while in motion, by means of aneccentric yoke, cam-hook, and a pawl to move the reversing-haralternately in reverse directions; secondly, in the usc of a ratchet andpawl for adjusting the trcadle so as to produce agreater or less throwof the table, as the nature oi' the work muy demand, such adjustmentbeing instantaneous andV more convenient than modeshitherto employed;and thirdly, in an improvedmanncr of feeding the wood to the.

chisel by means of a frietional roll of gum or other material,accomplishing the functions of what is known as acompound table, with a'cheaper and more simple mechanism.

To enable others skilled in the art to make and use our invention, wewill proceed to describe the manner of constructing and the mode ofoperating the same with the aid of the drawings.

In tig. l A' represents the main column, forming the support on whichthe machinery is mounted, with the side removed to show the mechanismwithin. B is the 'treadle for operating the table C. It is hinged at D,-

and is adjustable at different heights by means of thelpawl and ratchetshown at E, 'which determines its position with relation to the pivotedlever-piece F, and also regulates the throw of the table, which is movedby the link H and rod I, passing through stem J, which is fastened intothe table C, and works in a slot iu the front of the post A. K is afeed-roller, of India rubber or other similar material, and is revolvedby hand-wheel L and bevel-gear M, the roll resting at the bottom on theface of the match-gear below, which is not shown in the drawing. N isapiece of wood being mortised, and is kept down upon the tablc-platc Oand iu proper position by means of the guard P, which adjusts to talicpieces of diil'erent depths. The piece N is moved by the friction oi'the roll K in either direction to suit the length of mortisc requiredlScrew Q is to adjust the roll K. The main table-.support C is pivoted onthe plate It, so as to form angular inortiscs. S is the ehischbar,receiv ing motion from shaft T by means of cranlewhcel U and pitman V.Sg is a shell carrying the lugs t t, in which the bar S revolves bymeans of the reversing device at the lower bearing W, consisting of thegearing X, pulley Y, and belt Z. The hub of the gear c forms a shellaround the chisel-shaft S, and passes down through the bearing at W,having a feather orpsplinc for revolving the bar S. On thc lower orbottom end ci this shell is formed a eam-hool:, shown at 2, which worksin the yoke CZ, and holds the chisel in the proper position for cuttingin either direction, the belt Z meanwhile slipping around the pulley Y.lo reverse the chisel the yoke o? is moved in the direction indicated bythe arrow, iig. 2. This releases thc hook hl, and the chisehshaftinstantly revolves until this hook E comes in contact with the otherstop, making precisely a halt' revolution. The yoke d is moved by thebar g passing through and into thc column, as shown. 'lhis bar restsupon the cross-piece shown in section at 7i, and on its top is formedthe double concave, which will be better understood by referring to thediagram, iig. The rod t' rises and falls with the tabl/c C, and Vcarriesthe pawl m, which swings loose en pivot 1t, and passes alternately vonthe different sides of the pointy', moving the bar y in diierentdirections at each motion of the table. In iig. 3 the bar is shown asmoved to the right. At the next motion of the rod z' the pawl m fallsinto the position shown by red lines iniig. 3, and as the table comesdown passes on the other side of point r, striking against theshouldcrjv, moving the bar y to the left, allowing the chisel shaftS toturn half round, as before explained. g/s the driving-pulley.

Having described the nature of our invention, and the mannerof-construoting the same, we do not claim adjusting thetreaciieofamortising machine to eperte at di''erent heights, thisprinciple beingeld and applied to both foot and power mortisingmachines; but what we claim, and desire toseeure byjLettexs Patent, is-

1. The pawl w, for adjusting the treadle, arranged and operatingsubstantially as described. 2.. The yoked and devices g', m, r, and z',for reversing the chisel,v as herein set forth and described; 3. Theroller K, for feeding the'stui to `the chisel, operating in theInannlenand'forvthc purposes described.

WM. C. HARD, W.- R. HYDE.

